Display screen or a portion thereof with graphical user interface



FIG. 1 is a front view of the display screen or a portion thereof with graphical user interface, in accordance with a first embodiment of the present invention; and,

FIG. 2 is a front view of the display screen or a portion thereof with graphical user interface, in accordance with a second embodiment of the present invention.

The broken line showing of the display screen or a portion thereof forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 